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Stroboscopic real-time holographic interferometry with photorefractive crystals applied to modal analysis
Georges, Marc; Lemaire, Philippe
1997In Gorecki, Christophe (Ed.) Optical Inspection and Micromeasurements II
 

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Keywords :
photorefractive crystals; holographic interferometry; vibration measurement
Abstract :
[en] A breadboard holographic interferometer that uses a photorefractive sillenite crystal under the anisotropic diffraction configuration is presented for application to quantitative vibration measurements. After the hologram of the object at the rest is recorded, a stroboscope is used to observe the stable pattern of the vibrating object and phase-shifting is introduced for quantitative measurements. It is shown that this system can measure modal displacements of objects of typically 25*25 cm/sup 2/ with high accuracy ( lambda /40) by using a continuous YAG laser emitting 490 mW at 532 nm. The error sources are investigated and particularly a systematic error arising from the stroboscopic process can be calculated and eliminated
Disciplines :
Physics
Author, co-author :
Georges, Marc ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Lemaire, Philippe ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Language :
English
Title :
Stroboscopic real-time holographic interferometry with photorefractive crystals applied to modal analysis
Publication date :
June 1997
Event name :
Optical Inspection and Micromeasurements II
Event place :
Munich, Germany
Event date :
September 1997
Audience :
International
Main work title :
Optical Inspection and Micromeasurements II
Editor :
Gorecki, Christophe
Publisher :
The International Society for Optical Engineering, Bellingham, WA, United States
ISBN/EAN :
9780819421685
Collection name :
Proceedings of the SPIE - The International Society for Optical Engineering, Vol 3098
Pages :
241-250
Available on ORBi :
since 25 November 2010

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